Trying to get to the cause. There are 2 extensions on a client enterprise site, 1 pre-existing and 1 new (Magebuzz FAQs) these work on the front end but when I try and access them on the backend I get 404s. The URL doesn't seem right: /index.php/faq/adminhtml_faq/... rather than /admin/...
The plugins load fine on a local dev and remote dev environment just not on the live site.
Is there anything obvious that I am missing? Have tried the usual clearing caches, saving admin role user and logging out and in.
It looks like your client has SUPEE-6788 security patch installed in EE 1.13, and the extensions you're trying to access haven't been made compatible with this patch.
Here is what we mean - https://www.aitoc.com/blog/magento-1-9-2-2-access-problem/
With this patch (and the release of Magento 184.108.40.206 that has it out of the box), many extensions and customization became inaccessible, and the developers (Aitoc included) had to fix them to make them work with the new routing model.
Hope this helps
Aitoc is a group of distinguished web developers that have been building for Magento since 2009.
See our extensions for Magento 2.